<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
        <div id="app">
            <cpn></cpn>
        </div>

        <template id="cpn">
            <div>
                <h2>我是一个子组件</h2>
                <button @click="btnClick">我是子组件的按钮</button></button>
            </div>
        </template>
        <script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
        <script>
            const app=new Vue({
                el:'#app',
                data:{
                    message:'vuejs'
                },components:{
                    cpn:{
                        template: '#cpn',
                        methods: {
                            btnClick() {
                                console.log('btnClick');
                                console.log(this.$parent);
                            },
                        },
                    }
                },methods: {
                    
                },
            })
        </script>
</body>
</html>